Datasheet

Figure 46-7. Single-Shot Filtering
Sampling Clock
3-bit Sampled
Comparator Output
3-bit Majority
Filter Output
Start
5-bit Sampled
Comparator Output
5-bit Majority
Filter Output
t
STARTUP
During Sleep modes, filtering is supported only for single-shot measurements. Filtering must be disabled
if continuous measurements will be done during Sleep modes, or the resulting interrupt/event may be
generated incorrectly.
46.6.8 Comparator Output
The output of each comparator can be routed to an I/O pin by setting the Output bit group in the
Comparator Control x register (COMPCTRLx.OUT). This allows the comparator to be used by external
circuitry. Either the raw, non-synchronized output of the comparator or the CLK_AC-synchronized version,
including filtering, can be used as the I/O signal source. The output appears on the corresponding CMP[x]
pin.
46.6.9 Offset Compensation
The Swap bit in the Comparator Control registers (COMPCTRLx.SWAP) controls switching of the input
signals to a comparator's positive and negative terminals. When the comparator terminals are swapped,
the output signal from the comparator is also inverted, as shown in Figure 46-8. This allows the user to
measure or compensate for the comparator input offset voltage. As part of the input selection,
COMPCTRLx.SWAP can be changed only while the comparator is disabled.
Figure 46-8. Input Swapping for Offset Compensation
MUXPOS
MUXNEG
+
-
COMPx
SWAP
ENABLE
HYSTERESIS
SWAP
CMPx
COMPCTRLx
46.6.10 DMA Operation
Not applicable.
46.6.11 Interrupts
The AC has the following interrupt sources:
• Comparator (COMP0, COMP1): Indicates a change in comparator status.
• Window (WIN0): Indicates a change in the window status.
SAM D5x/E5x Family Data Sheet
AC – Analog Comparators
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 1649